[GRASS5] r.binfer compile problem

[Michel Wurtz - ENGEES/CEREG]

Markus Neteler wrote:
> 
> Dear developers,
> 
> another own compile problem I have with
> r.binfer/Linux.
> 
> I have two different platforms running Linux.
> 
> A definition in:
> src/raster/r.binfer/binfer.l
> is causing problems.
> 
> [row 39]
> 
> #ifndef sparc
> #ifndef linux
> int yylineno = 1;
> #endif
> #endif
> 
> On machine one above compiles, on machine two I get
> binfer.l: In function 'yylex':
> binfer.l:114: 'yylineno' undeclared (first use in this function)
> binfer.l:114: (Each undeclared identifier is reported only once
> binfer.l:114: for each function it appears in.)
> make: *** [OBJ.i586-linux-elf/lex.o] Error 1
> 
> It is quite strange. Any ideas?

Are you using flex ? (the lex program from GNU/FSF)
I had the same message. Look at the command being run
If it is flex instead of lex, you have to add the -l option.
"flex -l" knows about yylineno, but not flex.  The man page said:

 flex's -l option turns on maximum compatibility with the original
 AT&T  lex implementation, at the cost of a major loss in the gen-
 erated scanner's performance.  We note below which incompatibili-
 ties can be overcome using the -l option.
 
 flex is fully compatible with lex with the following exceptions:
 -      The undocumented lex scanner internal variable yylineno is
        not supported unless -l or %option yylineno is used.               

etc.

Doing this solved the problem when compiling grass4.3 with a
Slakware 7.0 Linux distribution, and installing flex and not lex.
The normal way is to have a shell script /usr/bin/lex which looks

#!/bin/sh
flex -l $*

but this file wasn't created on my home machine (altough it was
on my work machine : wrong answer while installing Linux ?) 
-- 
Michel Wurtz    ENGEES - CEREG
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